Looks nice, but i am seeing a very 'lazy' pattern in which not many of your sculpts actually make sense. I can see this especially in the heads, i often see random bits and pieces that have no anatomical sense at all.
You seem to have got into the habit of adding lots of lumps into the muscles too, including the face, it just makes the model a lot harder to read.
My crit would be to clean up the mesh, get rid of anything that is there without a purpose, and work on the lumpiness, you should see a vast improvement.
Sorry if that came of harsh, i just want to push these to their best.
